I'm not sure I follow your question. The Gagguino project is an open-source PID controller with oodles of extras, using the Arduino framework. Feed-forward control of the heating element, pressure control via phase modulation of the vibe pump, fancy displays and ...

... You might like one too. Great steaming. Back to back shots? No problem - no matter how fast you are. Temperature stability? Saturated group & PID controller, one of the best. I would suggest the Idromatic version with some custom options to make it a virtual one of a kind

I'm very certain that this isn't very challenging or even difficult for a good design engineer with decent tools to analyze the system. It boggles my mind why a truly temperature stable machine isn't available. PIDs and computing isn't expensive these days. IMO controlling temperature of a group tha...

... the OP's question. And stable temps are important and worthwhile of course. But I'm still stuck on a drop in temp from back to back shots on a PID controlled machine causing the shot to run fast. Taste worse, perhaps. Be

How about fitting a PID to the Gaggia? I'm assuming since it is a column of water held, it will be beneficial to hitting target desired temperatures over the pressurestat (?) system as stock? I guess there isn't as much of a 'system ...

So any dual boiler PID should fit the bill. Got it. Thanks!

... there's no need to spend speedster and strata type of money to get what u want. I have a Nurri L type SA spring Lever machine that has a 3 channel PID that is able to set and regulate the temperature of the grouphead vs the brew boiler vs the steam boiler (its a. Double boiler) independently. It ...

Ramp/soak PID controllers are fairly inexpensive now, and using them on inlet temperature is a lot more robust in control terms than on bean (outlet) temperature, due to the faster feedback. The ramp/soak allows you to program ...

I'm happy you said that. I was seeing that with the 20-30s flushes that lots of articles/posts suggest, it was just decimating the group temp and it would take a long time to recover

There's no need for a flush routine with a PID e61. For 15 years on PID HX: * Flush ≈1s * Pull shot * Flush ≈1s to rinse & brush shower screen * PF wiggle w blind basket, leaving blind in the group * enjoy When pulling shots for a group, just skip the PF